ovl_permission 1246 fs/overlayfs/dir.c .permission = ovl_permission, ovl_permission 486 fs/overlayfs/inode.c .permission = ovl_permission, ovl_permission 504 fs/overlayfs/inode.c .permission = ovl_permission, ovl_permission 355 fs/overlayfs/overlayfs.h int ovl_permission(struct inode *inode, int mask);